/Engine/Plugins/Online/OnlineSubsystemSteam/Source/Public/OnlineAuthInterfaceUtilsSteam.h
Status flags of SteamAuth response codes, mapped 1:1 with SteamAPI
enum ESteamAuthResponseCode { OK = 0, NotConnectedToSteam = 1, NoOwnership = 2, VACBanned = 3, LoggedInElsewhere = 4, VACCheckTimeout = 5, TicketCancelled = 6, TicketAlreadyUsed = 7, TicketInvalid = 8, PublisherBanned = 9, FailedToCreateUser = 20, Count, }